Electric toothbrush and control method and control device therefor

Abstract

The application discloses an electric toothbrush and a control method and device thereof, and relates to the technical field of oral cleaning. The application comprises the following steps: outputting a cleaning control signal to the motor driving circuit; during the operation of the electric toothbrush, if a preset voice prompt trigger condition is detected to be met, the output of the cleaning control signal is interrupted, and the voice storage circuit is controlled to output an audio signal to the motor driving circuit; after the voice prompt is ended, the output of the audio signal is stopped, and the output of the cleaning control signal is resumed. The application uses the motor and the driving circuit thereof as a bone conduction sound production unit, so that the voice prompt function with clear and good privacy is realized without adding an independent loudspeaker or a sound outlet. Through the signal switching mechanism, the application effectively avoids the mutual interference of the cleaning signal and the audio signal on the common path, and ensures the fidelity of the voice prompt and the stability of the tooth brushing function.

Description

Technical Field

[0001] This application relates to the technical field of oral hygiene, and in particular to an electric toothbrush and its control method and control device. Background Technology

[0002] Currently, electric toothbrushes primarily use methods such as increased vibration, flashing lights, or beeping alerts. However, these methods have the following drawbacks:

[0003] Vibration or light alerts are easily overlooked. The motor itself vibrates during brushing, and additional vibration alerts can be confusing. Light alerts require active observation by the user, making them less practical. Buzzer alerts negatively impact the user experience; the noise may disturb others and is easily masked by motor vibrations in noisy environments, making it difficult for users to hear the alert. Furthermore, buzzers typically require a sound outlet, increasing the difficulty of waterproofing the product. Traditional alert methods can only transmit simple signals and cannot handle complex information interaction; users need to learn the meaning of various alerts beforehand. Some solutions using chips to output simple frequencies have poor sound quality, often accompanied by high-frequency noise, affecting ear comfort. Summary of the Invention

[0004] The main purpose of this application is to provide an electric toothbrush and its control method and control device, which aims to solve the technical problems of existing electric toothbrush reminder methods, such as being easily ignored, disturbing others, having limited information transmission, poor sound quality, and difficulties in waterproof design.

[0005] To achieve the above objectives, this application proposes a control method for an electric toothbrush, the electric toothbrush including a motor, a motor drive circuit for driving the motor, and a voice storage circuit for storing audio signals, wherein the output terminal of the voice storage circuit is connected to the input terminal of the motor drive circuit, comprising: In response to the user's operation, a cleaning control signal is output to the motor drive circuit to drive the motor to generate a vibration at a cleaning operating frequency corresponding to the cleaning control signal; During the operation of the electric toothbrush, if the preset voice reminder trigger condition is detected to be met, the output of the cleaning control signal is interrupted, and the voice storage circuit is controlled to output an audio signal to the motor drive circuit to drive the motor to generate an audio frequency band vibration corresponding to the audio signal, so as to output a voice prompt to the user through bone conduction. After the voice prompt ends, the output of the audio signal is stopped, and the output of the cleaning control signal is resumed.

[0006] In one embodiment, the specific steps of interrupting the output of the cleaning control signal and controlling the voice storage circuit to output an audio signal to the motor drive circuit include: The output of the cleaning control signal is interrupted, and a first signal dead zone of a preset duration is executed; After the first signal dead zone ends, the voice storage circuit is controlled to output the audio signal to the motor drive circuit.

[0007] In one embodiment, the specific steps of stopping the output of the audio signal and resuming the output of the cleaning control signal after the voice prompt ends include: After the voice prompt ends, the output of the audio signal is stopped, and a second signal dead zone of a preset duration is executed; After the second signal dead zone ends, the output of the cleaning control signal is restored.

[0008] In one embodiment, the specific steps of interrupting the output of the cleaning control signal and executing a first signal dead zone of a preset duration further include: When the output of the cleaning control signal is interrupted, the cleaning control signal is subjected to tail compression processing to compress the delay of the ending edge to a predetermined first delay threshold to form a first signal dead zone. Alternatively, the specific steps of stopping the output of the audio signal and executing a second signal dead zone of a preset duration after the voice prompt ends further include: When the output of the audio signal is stopped, the audio signal is subjected to tail compression processing to compress the delay of the ending edge to a predetermined second delay threshold to form a second signal dead zone.

[0009] In one embodiment, the specific steps of outputting a cleaning control signal to the motor drive circuit in response to a user's operation to drive the motor to generate vibrations at a cleaning operating frequency corresponding to the cleaning control signal include: In response to the user's operation, determine the corresponding target cleaning level; Based on the target cleaning level, a matching cleaning control signal is output to the motor drive circuit to drive the motor to generate a vibration at a cleaning operating frequency corresponding to the target cleaning level.

[0010] In one embodiment, it further includes: During the voice prompt output, if a user's brushing speed switching command is received, the output of the cleaning control signal is interrupted until the audio signal finishes playing.

[0011] In one embodiment, the preset voice reminder triggering condition includes at least one of the following: The brushing time reaches a preset threshold, excessive brushing pressure is detected, or the current cleaning area is detected as complete.

[0012] In addition, to achieve the above objectives, this application also proposes a control device, the device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the control method for the electric toothbrush as described above.

[0013] In addition, to achieve the above objectives, this application also proposes an electric toothbrush, including a toothbrush body, a motor, and a control device as described above.

[0014] In one embodiment of an electric toothbrush, the electric toothbrush further includes a housing and a motor bracket disposed within the housing; the physical transmission path of the voice prompt is as follows: it is transmitted sequentially through the motor, the motor bracket, and the housing to the toothbrush body, and then transmitted to the auditory nerve via the user's teeth and skull.

[0015] One or more technical solutions proposed in this application have at least the following technical effects: This application utilizes a reused motor and its drive circuit as a bone conduction sound unit, achieving clear and private voice prompts without the need for additional independent speakers or sound outlets. Through a signal switching mechanism, this application effectively avoids interference between cleaning signals and audio signals on a shared path, ensuring the fidelity of voice prompts and the stability of the brushing function. Furthermore, this application simplifies the product structure, reduces material and waterproof design costs, and is particularly suitable for applications with high requirements for user experience and product reliability. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a flowchart illustrating an embodiment of a control method for an electric toothbrush according to this application. Figure 2 This is a flowchart illustrating another embodiment of a control method for an electric toothbrush according to this application.

[0019] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0021] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0022] As a popular personal care appliance, the core function of an electric toothbrush is to clean teeth by using a motor to drive the brush head to vibrate or rotate at a specific frequency. To enhance the user experience, modern electric toothbrushes generally integrate various reminder functions, such as using vibration, light, or beeping sounds to indicate brushing time, brush head replacement, or excessive pressure. These reminder mechanisms aim to guide users to develop scientific brushing habits.

[0023] However, existing reminder methods have significant limitations. Vibration reminders, with the toothbrush continuously operating, are easily masked or confused by the main vibration, making them difficult for users to notice. Light reminders rely on the user's visual attention, and their effectiveness is greatly reduced when the user is focused on oral cleaning or in poorly lit environments. The more common buzzer reminder, while providing a clear audible signal, emits a sound that travels through the air, potentially disturbing others in the early morning or quiet environments, and easily distracted by ambient noise or the toothbrush's own motor noise in noisy environments.

[0024] Furthermore, buzzers typically require sound holes to be cut into the product casing, which presents a structural design challenge for achieving high levels of waterproofing, increasing manufacturing complexity and cost. From an information transmission perspective, whether it's a simple change in vibration pattern, flashing light, or a monotonous buzzing sound, it can only convey the very limited state of being alerted, but cannot transmit specific information such as what the alert is about. Users need to memorize the meaning of different prompt modes in advance, resulting in a high learning cost.

[0025] To address these issues, some technical solutions attempt to use chips to directly output electrical signals of a specific frequency to drive miniature sound-generating elements. However, these solutions are often limited by component performance and circuit design, resulting in poor sound quality, frequently accompanied by harsh high-frequency noise or distortion, leading to a poor auditory experience and difficulty in conveying friendly and intimate voice messages. They are especially unsuitable for children who are sensitive to sound or require guidance.

[0026] Bone conduction technology offers a new solution to the aforementioned dilemmas. This technology utilizes the principle of solid-state sound transmission, converting electrical signals into mechanical vibrations that are transmitted directly to the auditory nerve in the inner ear through the human skeleton, rather than through air conduction. This method offers advantages such as strong sound directionality, good privacy, and strong resistance to environmental noise interference. Theoretically, applying it to electric toothbrushes could bypass the drawbacks of air conduction, achieving clear and non-intrusive voice prompts. However, integrating bone conduction technology into electric toothbrushes faces practical challenges. One direct approach is to add a dedicated bone conduction vibrator inside the toothbrush, but this would lead to a complex product structure, limited internal space, increased costs, and potentially additional power consumption.

[0027] This application proposes a control method for an electric toothbrush, the electric toothbrush including a motor, a motor drive circuit for driving the motor, and a voice storage circuit for storing audio signals. The output terminal of the voice storage circuit is connected to the input terminal of the motor drive circuit. (See reference...) Figure 1 ,include: S100: In response to the user's operation, output a cleaning control signal to the motor drive circuit to drive the motor to generate vibrations at a cleaning operating frequency corresponding to the cleaning control signal; S200: During the operation of the electric toothbrush, if the preset voice reminder trigger condition is detected to be met, the output of the cleaning control signal is interrupted, and the voice storage circuit is controlled to output an audio signal to the motor drive circuit to drive the motor to generate an audio frequency band vibration corresponding to the audio signal, so as to output a voice prompt to the user through bone conduction. S300: After the voice prompt ends, stop the output of the audio signal and resume the output of the cleaning control signal.

[0028] Example 1: This application proposes a control method for an electric toothbrush. The electric toothbrush includes a motor, a motor drive circuit for driving the motor, and a voice storage circuit for storing audio signals. The output terminal of the voice storage circuit is connected to the input terminal of the motor drive circuit. The control method includes the following steps.

[0029] In step S100, the electric toothbrush responds to the user's operation command by outputting a cleaning control signal to the motor drive circuit. The motor drive circuit drives the motor to operate according to the frequency and amplitude characteristics of the cleaning control signal, causing the motor to vibrate at a cleaning frequency corresponding to the cleaning control signal. The motor's vibration is transmitted to the tooth surface through the toothbrush head, realizing the brushing cleaning process. This process establishes the basic operating state of the electric toothbrush, providing a working platform for triggering subsequent voice prompt functions. The control parameters in the motor drive circuit can be adjusted according to the cleaning mode to ensure that the vibration frequency and power meet different cleaning needs.

[0030] In step S200, the system continuously monitors the status of the voice prompt triggering conditions during the operation of the electric toothbrush. When the preset condition is detected to be met, the control logic module interrupts the output of the cleaning control signal. After the motor drive circuit stops receiving the cleaning control signal, the voice storage circuit outputs an audio signal to the motor drive circuit. The motor drive circuit drives the motor according to the waveform and frequency characteristics of the audio signal, causing the motor to vibrate in the audio frequency band corresponding to the audio signal. The vibration of the motor's audio frequency band is transmitted to the user's skull through the toothbrush handle, realizing voice prompt output via bone conduction. This method achieves voice prompt function during the operation of the electric toothbrush without the need for an additional speaker structure, reducing the overall size and number of components, and maintaining the integrity of the waterproof structure.

[0031] In step S300, after the voice prompt signal output ends, the control logic resumes the output of the cleaning control signal. The motor drive circuit receives the cleaning control signal again and drives the motor to resume the cleaning operating frequency vibration. The electric toothbrush re-enters the normal cleaning operation state. This process realizes automatic switching between cleaning work and voice prompt function, ensuring that the cleaning task continues after the voice prompt ends, improving the continuity and automation of the usage process.

[0032] This application integrates the cleaning function and voice prompt function of an electric toothbrush. By switching and controlling the motor drive signal, the motor can perform different functions in different vibration modes at different frequency bands. Structurally, this method utilizes existing motors and drive circuits, eliminating the need for additional voice output components. It achieves synchronous operation of voice prompts and cleaning, improving system integration, simplifying control logic, and enhancing functional response efficiency and user-friendly operability. Simultaneously, it simplifies the product structure, reduces material and waterproof design costs, and is particularly suitable for applications with high requirements for interactive experience and product reliability.

[0033] Example 2: This example further elaborates on the conditions for triggering voice reminders, based on Example 1.

[0034] In step S100, in response to the user's operation, a cleaning control signal is output to the motor drive circuit. The microcontroller detects the button input signal and, in response to the user's operation, determines the corresponding target cleaning level. Based on the determined target cleaning level, the microcontroller generates a matching cleaning control signal and outputs it to the motor drive circuit. The motor drive circuit amplifies the differential digital signal and drives the ultrasonic motor to generate vibrations at the cleaning frequency corresponding to the target cleaning level, performing the regular brushing action.

[0035] In step S200, a preset voice reminder trigger condition is detected. When triggered, the cleaning control signal is interrupted, and an audio signal is output. It is worth noting that the preset voice reminder trigger condition refers to the state determination logic embedded in the microcontroller via software code before the product leaves the factory. During operation, the microcontroller reads feedback values ​​from internal timers or external sensors in real time and compares them with the internally stored logic conditions.

[0036] During the operation of the electric toothbrush, the microcontroller continuously monitors whether preset voice reminder trigger conditions are met. Specific preset conditions include: the accumulated brushing time of the microcontroller's internal timer reaches a preset time node (such as a 30-second zone change reminder or a 2-minute end reminder); or the microcontroller receives a voltage value from a pressure sensor exceeding a preset overpressure alarm threshold; or the algorithm determines that the currently selected tooth area has completed the cleaning step. If any of the above trigger conditions are met, the microcontroller executes a priority strategy: interrupting the output of the cleaning control signal and sending a read command to the voice storage circuit. Upon receiving the command, the voice storage circuit outputs the corresponding audio signal to the motor drive circuit. The motor drive circuit drives the ultrasonic motor to generate vibrations in the audio frequency band corresponding to the audio signal, outputting voice prompts to the user via bone conduction.

[0037] In step S300, the cleaning action resumes after the voice prompt ends. The microcontroller detects that the voice prompt has finished playing, instructs the voice storage circuit to stop outputting the audio signal, and then resumes outputting the cleaning control signal, causing the ultrasonic motor to resume vibration at the corresponding cleaning operating frequency.

[0038] Example 3, see Figure 2 This includes steps SA10 to SA50: SA10: In response to user operation, output cleaning control signal to the motor drive circuit to drive the motor to generate vibration at a cleaning operating frequency corresponding to the cleaning control signal; SA20: During the operation of the electric toothbrush, if the preset voice reminder trigger condition is detected to be met, the output of the cleaning control signal is interrupted and a first signal dead zone of preset duration is executed. SA30: After the first signal dead zone ends, the voice storage circuit is controlled to output the audio signal to the motor drive circuit to drive the motor to generate vibration of the audio frequency band corresponding to the audio signal, so as to output voice prompts to the user through bone conduction. SA40: After the voice prompt ends, stop the output of the audio signal and execute a second signal dead zone of a preset duration; SA50: After the second signal dead zone ends, the output of the cleaning control signal is restored.

[0039] This embodiment, based on Embodiment 2, further details the anti-collision handling mechanism when switching between the cleaning control signal and the audio signal. Since the cleaning control signal and the audio signal share the same motor drive path, simultaneous loading will cause level conflicts and current overload. Therefore, the following control logic is adopted: In the anti-collision processing of switching from brushing teeth to voice commands, during steps SA20-SA30 above, when the cleaning control signal output is interrupted, the cleaning control signal is simultaneously compressed at the end. Specifically, the processing method involves shortening the attenuation period of the cleaning control signal's ending edge using a control algorithm, compressing the delay of the ending edge to within a predetermined first delay threshold, thereby quickly cutting off the output and forming a first signal dead zone of a preset duration. During the first signal dead zone, the input terminal of the motor drive circuit remains in a state of no valid signal input, so that the current and level state inside the motor drive circuit return to zero or fall back to a stable threshold. Only after the first signal dead zone ends does the microcontroller control the voice storage circuit to output the audio signal to the motor drive circuit.

[0040] Furthermore, regarding the anti-collision handling when switching from voice to brushing, in steps SA40-SA50 above, after the voice prompt ends, the microcontroller stops the output of the audio signal and performs tail compression processing on the audio signal. Specifically, the delay of the audio signal's ending edge is compressed to within a predetermined second delay threshold to form a second signal dead zone of a preset duration. During the second signal dead zone, the input terminal of the motor drive circuit also remains in a state of no valid signal input to release the electrical margin generated by the audio signal. After the second signal dead zone ends, the microcontroller resumes the output of the cleaning control signal.

[0041] It is worth noting that the preset duration refers to a fixed time interval set in the microcontroller's control algorithm. The preset duration of the first signal dead zone refers to the forced waiting time set by the algorithm from when the microcontroller issues an interrupt cleaning control signal command to when the voice reading command is allowed. This duration is set based on the discharge characteristics of components such as capacitors and inductors in the motor drive circuit, ensuring that the cleaning control signal level at the input of the drive circuit completely attenuates below the safe isolation level within this time period. The preset duration of the second signal dead zone refers to the forced waiting time set by the algorithm from when the audio signal output stops to when the cleaning control signal output is allowed to resume. This duration is used to ensure that the electrical margin generated by the audio signal in the circuit is completely released. By setting these two preset dead zones, a signal isolation band is constructed at the software level, avoiding the superposition and level conflict of two signals on the same hardware path.

[0042] The predetermined delay threshold refers to the maximum time limit allowed for the signal termination edge (i.e., the decay process of the signal dropping from an active level to a zero or inactive level) in the tail compression processing algorithm. The predetermined first delay threshold is for the termination edge of the cleaning control signal. When the microcontroller interrupts the cleaning control signal, the algorithm forcibly intervenes in the duty cycle or amplitude change rate of the signal, compressing and limiting its decay time within the set first delay threshold. The predetermined second delay threshold is for the termination edge of the audio signal. At the end of audio playback, the algorithm also performs time-domain compression on the end waveform of the audio signal, limiting its decay time within the set second delay threshold. The setting of these two delay thresholds allows the signal to be quickly cut off within a very short, limited time, preventing uncontrollable signal tailing and ensuring that the first and second signal dead zones take effect accurately and on time.

[0043] Example 4: This example adds mutual exclusion logic for key operations based on the above examples.

[0044] While the voice storage circuit outputs audio signals to the motor drive circuit, the microcontroller continues to scan for user key presses. If a user-initiated brushing speed switching command is received during this period, the microcontroller will interrupt the output of the cleaning control signal, without immediately executing the speed switching action. Instead, it will temporarily store or block the command until the current audio signal finishes playing and the second signal dead zone is completed. Only then will the corresponding cleaning control signal output be restored based on the latest command status. This step prevents user key presses during voice playback from causing input signal corruption in the motor drive circuit.

[0045] Furthermore, this application also proposes a control device, the device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the control method for the electric toothbrush as described in the above embodiments. This can be implemented using a main controller, such as a DSP (Digital Signal Processor), FPGA (Field Programmable Gate Array), MCU (Microcontroller Unit), or SOC (System on Chip).

[0046] It is worth noting that since the control device of the present invention is applied to the control method of the electric toothbrush described above, the embodiments of the control device of the present invention include all the technical solutions of all embodiments of the control method of the electric toothbrush described above, and the technical effects achieved are exactly the same, so they will not be repeated here.

[0047] Furthermore, this application also proposes an electric toothbrush, including a toothbrush body, a motor, and a control device as described above. The electric toothbrush also includes a housing and a motor bracket disposed within the housing; the physical propagation path of the voice prompt is as follows: the sound is transmitted sequentially through the motor, motor bracket, and housing to the toothbrush body, and then conducted to the auditory nerve via the user's teeth and skull. When the motor drive circuit receives an audio signal and drives the ultrasonic motor, the ultrasonic motor generates vibrations in the audio frequency band corresponding to the audio signal. The physical propagation path of the voice prompt is as follows: the vibration in this audio frequency band is transmitted sequentially through the ultrasonic motor, motor bracket, and housing to the toothbrush body; when the user uses the toothbrush, the vibration is conducted to the user's auditory nerve via the user's teeth and skull, thereby achieving bone conduction voice prompts.

[0048] This application also proposes an electric toothbrush, including a toothbrush body, a motor, and a control device as described in any of the above embodiments. Furthermore, the electric toothbrush further includes a housing and a motor bracket disposed within the housing.

[0049] The control device is integrated on a printed circuit board and sealed within the internal cavity of the housing. The control device includes a microcontroller, a voice storage circuit, and a motor drive circuit. The motor is mounted and fixed to a motor bracket, which is mechanically coupled to the inner wall of the housing. The top of the housing extends from or is connected to the toothbrush body, such as a brush head assembly containing bristles, allowing the mechanical vibrations generated by the motor to be conducted along a solid structure. Electrically, the power input terminal of the motor is electrically connected to the signal output terminal of the motor drive circuit in the control device. The motor is a broadband ultrasonic motor capable of generating vibration response in the 20kHz frequency domain, used to receive differential digital signals output from the motor drive circuit and output corresponding mechanical vibrations based on the received signal frequency and amplitude.

[0050] When the control device responds to user input and is in cleaning mode, the microcontroller inside the control device outputs a cleaning control signal to the motor drive circuit, which in turn outputs a drive current to the motor. Upon receiving this drive current, the motor generates a low-frequency, high-amplitude cleaning frequency vibration corresponding to the cleaning control signal. This vibration is transmitted to the outer casing via the motor bracket and ultimately to the toothbrush body, driving the bristles on the toothbrush body to perform a physical cleaning action on the tooth surface.

[0051] When the control device detects that a preset voice prompt trigger condition is met, it executes a first signal dead zone of a preset duration, interrupting the cleaning control signal. Subsequently, it controls the voice storage circuit to output an audio signal to the motor drive circuit. The motor drive circuit amplifies the audio signal and outputs it to the motor. Upon receiving the amplified audio signal, the motor generates an audio frequency band vibration corresponding to the waveform of the audio signal. In this state, the physical propagation path of the voice prompt is as follows: the audio frequency band vibration generated by the motor is transmitted sequentially through the motor, motor bracket, and outer casing to the toothbrush body; during the user's use of the electric toothbrush, when the toothbrush body contacts the user's teeth, the audio frequency band vibration is transmitted to the user's auditory nerve via the solid medium of the user's teeth and skull. Through the above physical transmission process, the high-frequency mechanical vibration output by the motor is converted into a voice prompt sound perceptible to the user. After the voice prompt ends, the control device executes a second signal dead zone of a preset duration, stopping the output of the audio signal and restoring the cleaning control signal. The motor then stops vibrating the audio frequency band and resumes vibration at the cleaning operating frequency.

[0052] The above description is only a part of the embodiments of this application and does not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.

Claims

1. A control method for an electric toothbrush, characterized in that, The electric toothbrush includes a motor, a motor drive circuit for driving the motor, and a voice storage circuit for storing audio signals. The output terminal of the voice storage circuit is connected to the input terminal of the motor drive circuit, and includes: In response to the user's operation, a cleaning control signal is output to the motor drive circuit to drive the motor to generate a vibration at a cleaning operating frequency corresponding to the cleaning control signal; During the operation of the electric toothbrush, if the preset voice reminder trigger condition is detected to be met, the output of the cleaning control signal is interrupted, and the voice storage circuit is controlled to output an audio signal to the motor drive circuit to drive the motor to generate an audio frequency band vibration corresponding to the audio signal, so as to output a voice prompt to the user through bone conduction. After the voice prompt ends, the output of the audio signal is stopped, and the output of the cleaning control signal is resumed.

2. The control method for an electric toothbrush as described in claim 1, characterized in that, The specific steps of interrupting the output of the cleaning control signal and controlling the voice storage circuit to output an audio signal to the motor drive circuit include: The output of the cleaning control signal is interrupted, and a first signal dead zone of a preset duration is executed; After the first signal dead zone ends, the voice storage circuit is controlled to output the audio signal to the motor drive circuit.

3. The control method for an electric toothbrush as described in claim 1, characterized in that, The specific steps for stopping the output of the audio signal and restoring the output of the cleaning control signal after the voice prompt ends include: After the voice prompt ends, the output of the audio signal is stopped, and a second signal dead zone of a preset duration is executed; After the second signal dead zone ends, the output of the cleaning control signal is restored.

4. The control method for an electric toothbrush as described in claim 2 or 3, characterized in that, The specific steps of interrupting the output of the cleaning control signal and executing a first signal dead zone of a preset duration further include: When the output of the cleaning control signal is interrupted, the cleaning control signal is subjected to tail compression processing to compress the delay of the ending edge to a predetermined first delay threshold to form a first signal dead zone. Alternatively, the specific steps of stopping the output of the audio signal and executing a second signal dead zone of a preset duration after the voice prompt ends further include: When the output of the audio signal is stopped, the audio signal is subjected to tail compression processing to compress the delay of the ending edge to a predetermined second delay threshold to form a second signal dead zone.

5. The control method for an electric toothbrush as described in claim 1, characterized in that, The specific steps of responding to the user's operation and outputting a cleaning control signal to the motor drive circuit to drive the motor to generate vibrations at a cleaning operating frequency corresponding to the cleaning control signal include: In response to the user's operation, determine the corresponding target cleaning level; Based on the target cleaning level, a matching cleaning control signal is output to the motor drive circuit to drive the motor to generate a vibration at a cleaning operating frequency corresponding to the target cleaning level.

6. The control method for an electric toothbrush as described in claim 5, characterized in that, Also includes: During the voice prompt output, if a user's brushing speed switching command is received, the output of the cleaning control signal is interrupted until the audio signal finishes playing.

7. The control method for an electric toothbrush as described in claim 6, characterized in that, The preset voice reminder trigger conditions include at least one of the following: The brushing time reaches a preset threshold, excessive brushing pressure is detected, or the current cleaning area is detected as complete.

8. A control device, characterized in that, The device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the control method for an electric toothbrush as claimed in any one of claims 1 to 7.

9. An electric toothbrush, characterized in that, It includes a toothbrush body, a motor, and a control device as described in claim 8.

10. The electric toothbrush as described in claim 9, characterized in that, The electric toothbrush also includes a housing and a motor bracket disposed within the housing; the physical transmission path of the voice prompt is as follows: it is transmitted sequentially through the motor, the motor bracket, and the housing to the toothbrush body, and then transmitted to the auditory nerve via the user's teeth and skull.

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